by S. Heisley » Sat Jun 05, 2010 9:21 am
Warpony:
I'm with Danny and Dean on vinyl windows (not vinyl clad). What neither of them really told you is the main reason that those are better is not only because of less trim maintenance. In my opinion, here is why vinyl is better:
It's not so much the brand as it is the way they are made. If the window has a wood frame, even if it is vinyl clad, it is more likely to expand and contract, sometimes considerably, with the change in temperatures. When that happens, the seal on the window frame may pull away from glass and cause the window to fail. This is especially true if the window has direct afternoon sunlight beamed on it. While vinyl can also expand and contract, it seems to be less vulnerable to that process than wood.
No double glass window lasts forever but some (vinyl framed) seem to last longer than others. The way it was explained to me, double paned glass windows insulate better not only because they are double but also because they have a type of gas in between the glass panes. When the seal between these panes of glass pulls away (due to contraction or age), it allows the gas to escape and be replaced by air. Air has moisture in it, so, eventually, that window not only looses some of its ability to insulate; but also, it fogs up with moisture and you then know you need to have it fixed. When that happens, (maybe in 10 years on the sunny side of your house if you have chosen vinyl but sooner if you have chosen wood) you won't have to replace the whole window, just the insulated glass. Still, getting them repaired can be a bit expensive and you won't want to put more money out any sooner than you have to.
That said, I don’t know what type of house you have. If you have what is called a ‘period’ house, you may want to go with wood frame to keep the period look. If so, be ready to make repairs on the windows sooner. When you are looking at windows, ask about warranties. When I was asking, Pella and Anderson (both wood framed styles) were not giving warranties on theirs. That may have changed but I’m still betting on the vinyl.